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  • java中引用数据类型Scanner类和Random类的使用-0509

    import java.util.Scanner;
    class Demo02 
    {
        public static void main(String[] args) 
        {
            //导包
            //创建该类对象
            Scanner sc = new Scanner(System.in);
            //用该对象调用类里面的方法
            //int i = sc.nextInt();
            //String str = sc.next();
            Double i = sc.nextDouble();
            System.out.println("你输入的内容为:"+i);
        }
    }
    import java.util.Scanner;
    class Demo04 
    {
        public static void main(String[] args) 
        {
            Scanner sc = new Scanner(System.in);
            /*int num = sc.nextInt();
            if(num%2==0){
               System.out.println("偶数");
            }else{
               System.out.println("奇数");
            }
            if(num<60){
               System.out.println("不及格");
            }else if(num<=70){
               System.out.println("良好");
            }else if(num<=80){
               System.out.println("中等");
            }else{
               System.out.println("优秀");
            }*/
            System.out.println("请输入");
            int a = sc.nextInt();
            System.out.println("请再次输入");
            int b = sc.nextInt();
            int max = 0;
            max = a>b?a:b;
            System.out.println("最大值为:"+max);
        }
    }
    import java.util.Random;
    class Demo03 
    {
        public static void main(String[] args) 
        {
            //导包
            //创建对象
            Random r = new Random();
            //调用方法,并定义一个变量去接收
            int sjs = r.nextInt(10);
            double sjxs = r.nextDouble();
            System.out.println(sjs);
            System.out.println(sjxs);
        }
    }
    import java.util.Random;
    class dianming 
    {
        public static void main(String[] args) 
        {
            Random r = new Random();
            int sz = r.nextInt(8);
            if(sz==0){
                System.out.println("董斌");
        }
             else if(sz==1){
                 System.out.println("张锐");
         }
             else if(sz==2){
                  System.out.println("王荣臣");
             }
             else if(sz==3){
                  System.out.println("韩凯");
             }
             else if(sz==4){
                   System.out.println("张禄");    
                       }
             else if(sz==5){
                   System.out.println("刘继勋");
             }
             else if(sz==6){
                   System.out.println("张维");
             }
             else{
                   System.out.println("魏子豪");
             }
             }
             }
    import java.util.Random;
    class szdianming 
    {
        public static void main(String[] args) 
        {
            Random r = new Random();
            int i = r.nextInt(8);
            String[] arr = {"董斌","张锐","王荣臣","韩凯","张禄","刘继勋","张维","魏子豪"};
            System.out.println(arr[i]);
        }
    }
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  • 原文地址:https://www.cnblogs.com/yelena-niu/p/9034995.html
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